The Los Angeles Business Journal’s index of the area’s largest public companies was flat for the week.

The LABJ weighted stock index fell less than 1 percentage point to 197. Laggers outpaced gainers by 82 to 74. There were eight companies unchanged.

Lions Gate Entertainment Corp. of Santa Monica was among the week’s biggest gainers. Shares rose 13 percent to $32.06 on the NYSE. The company announced an agreement this week with Alibaba Group Holding Ltd. of China to establish a new online video streaming service for Chinese audiences. It was also lifted along with other entertainment companies by reports of Rupert Murdoch’s attempt at a buyout of Time Warner.

Engineering and construction firm Aecom also had a big week. The Los Angeles company announced on Sunday that it will buy San Francisco’s URS Corp. in a $6 billion deal. Shares of Aecom jumped 12 percent during the past week to reach $35.42 on the NYSE.

The week’s laggers included Rubicon Project Inc., a Los Angeles ad tech company. Rubicon’s stock price fell 17 percent to $9.39 a share on the NYSE.